package com.dp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.dp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.dp.utils.RedisConstants.LOGIN_USER_TTL;

public class RefreshTokenInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 获取请求头中的token
        String token = request.getHeader("authorization");
        if (StrUtil.isBlankIfStr(token)){
            //不存在，放行
            return true;
        }
//        HttpSession session = request.getSession();
        // 基于token回去redis中的用户
        String key = RedisConstants.LOGIN_USER_KEY+token;
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries( key);
//        Object user = session.getAttribute("user");
        //判断用户是否存在
        if (userMap.isEmpty()){
            //不存在放行
//            response.setStatus(401);
            return true;
        }
        // 将查询到的数据转成UserDTO
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        //存在，保存到ThreadLocal
        UserHolder.saveUser(userDTO);

        System.out.println("user = " + userDTO);
        // 刷新token有效期
        stringRedisTemplate.expire(key,LOGIN_USER_TTL, TimeUnit.MINUTES);
        //放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
